Dec 18 05:44:20.457 INFO checking Razakhel/rs-ds against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 05:44:20.457 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/Razakhel/rs-ds:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 05:44:21.158 INFO [stdout] b85d6a2eda8188a3c2b81c87040206cb247ac23349ae1ba47f2b46e2b3ff5be7
Dec 18 05:44:21.160 INFO running `"docker" "start" "-a" "b85d6a2eda8188a3c2b81c87040206cb247ac23349ae1ba47f2b46e2b3ff5be7"`
Dec 18 05:44:23.396 INFO [stderr]     Checking rs-ds v0.1.0 (/opt/crater/workdir)
Dec 18 05:44:23.748 INFO [stderr] warning: struct is never constructed: `IntoIter`
Dec 18 05:44:23.748 INFO [stderr]   --> src/linked_list.rs:16:1
Dec 18 05:44:23.748 INFO [stderr]    |
Dec 18 05:44:23.748 INFO [stderr] 16 | pub struct IntoIter<T>(List<T>);
Dec 18 05:44:23.748 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 05:44:23.748 INFO [stderr]    |
Dec 18 05:44:23.748 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 05:44:23.748 INFO [stderr] 
Dec 18 05:44:23.748 INFO [stderr] warning: method is never used: `peek`
Dec 18 05:44:23.748 INFO [stderr]   --> src/linked_list.rs:38:3
Dec 18 05:44:23.748 INFO [stderr]    |
Dec 18 05:44:23.748 INFO [stderr] 38 |   pub fn peek(&self) -> Option<&T> {
Dec 18 05:44:23.748 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 05:44:23.748 INFO [stderr] 
Dec 18 05:44:23.748 INFO [stderr] warning: method is never used: `peek_mut`
Dec 18 05:44:23.748 INFO [stderr]   --> src/linked_list.rs:44:3
Dec 18 05:44:23.748 INFO [stderr]    |
Dec 18 05:44:23.748 INFO [stderr] 44 |   pub fn peek_mut(&mut self) -> Option<&mut T> {
Dec 18 05:44:23.748 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 05:44:23.748 INFO [stderr] 
Dec 18 05:44:23.748 INFO [stderr] warning: method is never used: `into_iter`
Dec 18 05:44:23.748 INFO [stderr]   --> src/linked_list.rs:50:3
Dec 18 05:44:23.748 INFO [stderr]    |
Dec 18 05:44:23.748 INFO [stderr] 50 |   pub fn into_iter(self) -> IntoIter<T> {
Dec 18 05:44:23.749 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 05:44:23.749 INFO [stderr] 
Dec 18 05:44:24.031 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
Dec 18 05:44:25.145 INFO running `"docker" "inspect" "b85d6a2eda8188a3c2b81c87040206cb247ac23349ae1ba47f2b46e2b3ff5be7"`
Dec 18 05:44:25.502 INFO running `"docker" "rm" "-f" "b85d6a2eda8188a3c2b81c87040206cb247ac23349ae1ba47f2b46e2b3ff5be7"`
Dec 18 05:44:25.840 INFO [stdout] b85d6a2eda8188a3c2b81c87040206cb247ac23349ae1ba47f2b46e2b3ff5be7